Matt Lewis

Nell goes under cover as replacement for a dead Defense Department researcher; the new NCIS assistant director questions Hetty's leadership.

Devon's doubts about his relationship reach a peak as his friends and family gather for his big wedding day; as Chastain's medical device company continues to succeed, Julian makes a discovery that leaves her uneasy about her involvement in it.

After a supernatural event takes the Witnesses by surprise, both Crane and Abbie are forced to work alongside their most hated foes yet. Meanwhile, Jenny and Joe struggle to salvage their relationship, as they continue to battle their own internal demons.

Blake thwarts Fallon's attempts to take the company in a new direction; Fallon realizes the biggest threat is actually Blake himself.

Guests: Michael Lewis, Tim Ryan, Nayyera Haq, Van Jones, Matt Lewis.